School & Teen Events Upcoming Semi-Formal Dance

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bluehand

New DJ
May 5, 2011
33
0
36
Indiana
For the pas few months I have been doing 200-300 person gigs using two jrx dual 15's and a prx18 inch subwoofer powered on a crown xls2500. I have a gig I was hired for that will have between 400-500 people attending. I'm curious about what I should do to expand my sound system. I have considered either purchasing

two new M-Audio GSR18 subs to stack my jrx dual 15's on with my current sub in the middle

OR

one new jbl prx18 inch sub and then stack my jrx dual 15's on the two prx 18 subs

OR


Two new Mackie Thump TH-15A's


If you could tell me which of these options is best, or possibly what other options would be better that would be great, Im running on a 1200 dollar budget for this purchase.
 
Hello itf it was my money I would get one more PRX18. Cluster the subs together in the center. Forget the Thumps they are very weak in spl.
 
Match your prx18 with a second one. Never missmatch subs! Couple them together in the center like drz said. Also find a way to get those jrx speakers so the tweeter at least is over peoples heads. Safely of course! Good luck with ur gig
 
Okay, so if I am not using the sub woofer to raise the dual 15's up then what would be some ideas of how to raise them up? Just wondering, thank you for all the responses though very helpful
 
Good call maestro. Of course you want to make sure no one ends up climbing on them. Make sure u do a site survey and know the room you are going to be in. There may be a raised are you can use or maybe even a stage. Also the venue or school may have risers or so they can set up in advance. If u setup on risers or a stage make sure your subs are on the floor of course.
 
bluehand said:
Okay, so if I am not using the sub woofer to raise the dual 15's up then what would be some ideas of how to raise them up? Just wondering, thank you for all the responses though very helpful
Click to expand...
Eventually you should look into getting Pole Mounted tops. I know you have a limited budget. Bear in mind that as you do these kind of events, instead of trying to find gear to fit your budget, you should instead budget/save for the needed gear. You will be happier.

For 400 people I would use at least 4 18" subs. I am doing a Production tomorrow and will be using 4 JBL Scoops and they are barely enough without fill. However, they are very efficient so they perform well.
 
Bluhand the first way is correct but dont forget to spred each stack out.
 
@ahoustondj
Spot on with the efficiency comment. Something i learned from my uncle who has been a sound engineer for live venues for many years is that it isn't always the wattage but the efficiency of a speaker. He has 4 custom built line arrays with a 4 inch 150 watt speaker in them and i have seen them out perform in quality and volume many a pole mounted 300Watt powered 10 or 12 inch. Its all about how efficient the speaker is.

You do need something to cover the lows though as they are only 4 inch woofers. lol, but im pretty surprised the deep response they get even without a sub. and the JBL scoops are really nice to put in that department.
 
And strap the 115's to the 125's from handle to handle for safety as the center of gravity of the 115's changes radically with the bulk of the weight on top so if somebody bumps the stack thw tops may fall over.
 
Coupling the horns as drzinc is suggesting actually accomplishes very little for this type of box and your application. Setting them side by side (like your other picture) accomplishes the same thing, and is much safer. All you gain by stacking the speakers horn to horn is about 1.5 db of output.
 
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